Lathe.



F. H. -BEROLD.

' LATHE. APPLICATION FILED IAY13, 1910.

Patented May 23, 1911.

3 BHEBTS-SHEBT 2.

www f y Z 5/ f1, 1 wf )QT @y -1 y f GMW T'. H. BERGLD.

* LATHE. APPLICATION FILED MAY 13, 1910.

menten yay 23, v1911.

a'- SHEETS-SHEET a.

V fg,

atm

E MORRIS PErrRs coA, wAsHnvaroN, n, t:A Y

UNiTED STATESPATENT OFFICE,

FREDERICK I-I. BEROLD, 0F CINCINNATI, CHIO.

LATI-IE.

TofaZZ whom 'it may concern:

Be it known that I, FREDERICK H. BERoLD, a citizenof the UnitedStates,residing at Cincinnati,y in the county of Hamilton and State ofOhio,have invented certain new and useful Improvementsy .in Lathes, of

Vwhich the following is a specification.

My invention relates to an improvement in lathes and p-rimarily in meansfor governv ing the rotation of the spindle, whereby the circumferenceof the work can be divisionvallyy spaced, in cutting a series of spiralgrooves and the like, accomplished on a mill-V companying drawings,`,forming a part of this specificatiom in which .y v

Figure 1 is a sectional elevation of lathe, with my improvementsapplied. Fig. 2 is a'front elevation of a portion of the headstock andindexing mechanism. Fig. 3 is an end elevation of the lathe. Fig. 4 is asection on line n, n, Fig.V 3with` top Yplan view of the carriage. Fig.5 is an enlarged section on line a2, Fig. 1, with the spindle worm wheelin elevation. Fig. .6 is an enlarged section on line/w, w, Fig. 2.

Y With my improvement in lathes, itis possible to dogeneral turning infinishing the periphery of the work, and without removing the `same orre'chucking Divisional horizontal grooving, spirally or otherwise can bemilled around the periphery. This is highly advantageous in makingcylinder printing rollsV and the like. y

1 represents the lathe bed of conventional form.; 1

p f represents the head-stock, and 3 the spindle journaled in thebearing 4.

6 represents a cone pulley loosely journaled upon the spindle and fixedtothe sleeve 7 likewise loose on the spindle. y

8 represents agear formed on the 'sleeve 7, in mesh with a gear 9, fixedto anA intermediate shaft 10, journaled .in bearings formed in thehead-stock.

Specification of Letters Patent. Patented May Application filed May 13,1910. Serial No. 561,256.

in -mesh with a change gear 12, journaled upon a stud pin 13, adjustablymounted upon the swinging quadrant 14.

15 represents a gear fixed to the shaft 16,

11 represents a gear fixed to the shaft 10,

journaled in the bearings 17, fixed to the head-stock, see Fig. 4a 18represents a bevel gear fixed upon the opposite end of shaft 16, in meshwith a bevel gear 19, fixed upon the transverse shaft 20, fortransmitting motion to the spindle dividing mechanism,

hereinafter to be described more in detail. Y

21 represents a back gear splined upon the spindle, and as illustrated,is provided with clutch teeth upon each side of its hub, adapted to be.alternately engaged with clutch teeth Vformed on the cone pulley 6` andthe worm wheel 22,'loose on the spindle, for engaging the same intodriving connection with the spindle. The gears 8 and 21 may be connectedthrough a system of back gears mounted upon a shaft, which in turn ,isec,- centrically mounted within brackets projected fromV the head-stock,shown in Fig. 3. This back gearing may be of conventional type c'bmmonin the art, wherein the back gear system of gearing can be thrown intoandA out of operation atk will, but the general details ofconstructionthereof are immaterial to the functions ofthis invention.Thus, by sliding gear 21 into engagementr with the' cone pulley, thelathe can be used in the generalmanner. In its intermediate position,disengaged from either the cone pulley or worm wheel 27, the back gearfing may be employed, and engaging the gear 21 with the worm Wheel a slowfeed may be impartedto the spindle. Itis obvious, however, that any formof clutchingmeans and ymechanism for producing the various spindlerotations may be employed, without departing Vfromthe features of myinvention, and I therefore do not wish to be limited to any particularform of obtaining the result.

The spindle divisional indexing and its relative drive is accomplishedas follows 23 represents a gear splined upon the shaft 20, having atapering face 24, adapted to b e frictionally clamped within a taperingrecess formed within the gear 25. The gear 25 is provided with anelongated sleeve 26, loosely journaled upon the shaft 20, and27represents a worm fixed upon said sleeve,

' inA mesh with the wo-rm wheel 22, see Fig,

and held against lateral displacement by the lock nuts and washers. 29represents a nut fitted upon the shaft 20, and screw threaded aipon thesleeve hub of the gear 23, for frictionally clamping the gear 23, withgear 25, for providing direct driving connection between the shaft 2Oand worm. 30 represent-s a gear in mesh with gear 23, mounted upon thestud shaft 31, see Figs. 4 and 6. 32 represents an index plate fixed tothe hub of the gear 30. 33 represents a crank fixed to the stud shaft31, provided with an indexing pin 34, adapted to be selectively engagedwith the indexing holes 34a, in the index plate 32, and 35representsgage arms commonly employed in indexing or dividing heads. 36represent gears Xed to the stud shaft 31, in mesh with gear 25. 37represents a gear journaled upon the stud pin 38, adjustably mountedupon the quadrant 40, see Fig. 3. Said gear 37 is in mesh with Va gear39, fixed upon the screw shaft 41, for feeding the carriage 42. Thecarriage feeding and driving mechanism may be of any conventional form,for providing the forward and reverse feed of the carriage upon the bed,and feeding the tool slide, and the same are not herewith illustrated.As illustrated, however, the carriage is provided with a coupon toolslide upon which is clamped a motor and cutter arbor supporting plate43. 44 represent journal bearings projected from said plate within whichis journaled the cutter arbor 45, carrying a cutter 46. 47 represents agear fixed upon said arbor, in mesh with a pinion 43, Xed upon the motorshaft of the motor 49, the motor being suitably clamped upon thesupporting plate 43.

The cutter arbor or spindle may be of any well-known form for detachablysupporting rotary cutting tools, and it is also obvious, that the arborcan be driven through a system of gearing from the carriage feed shaft50, commonly employed in lathes, instead of employing a motor drive,without departing from the features of my invention. It is also obvious,that various types of variable speed system of gearing may be employedbetween the gears 11 and 15, or 11 and 39, for providing the variousratios of speed required for relative. rotation of the spindle withcarriage feed, instead of the change gear system illustrated, withoutdeparting from the features of my invention.

Having described my invention, l claim 1. A combined milling and metalturning machine, comprising a conventional engine lathe organization ofbed, head-stock, spindle, carriage, tool-slide and feed shaft, variablespeed gear transmission mechanism for the spindle and feed shaft, forturning or screw cutting work, worm transmission mechanism for thespindle and feed shaftfor milling work, and'means for alternately'driving through either of said transmission mechanisms.

2. A combined milling and metal turning machine, comprising aconventional engine lathe organization of bed, head-stock, spindle,carriage, tool-slide, and feed shaft, variable speed gear transmissionmechanism for the spindle and feed shaft, for turning or screw cuttingwork, variable speed worm transmission mechanism for the spindle andfeed shaft, comprising a dividing mechanism for milling work, and meansfor driving through either of said transmission mechanisms.

3. A convertible turning and milling machine, comprising a latheorganization of bed, head-stock, spindle, carriage, and carriage feedingmeans, main driving means loose on the spindle, worm driving means looseon the spindle, a system o-f variable speed gearing and transmissionelements between said main driving means and worm, a system of variablespeed gearing, and transmission elements between the main driving meansand carriage feed means, means for alternately engaging said maindriving means, and worm driving means in driving connection with thespindle and rotative cutter driving means mounted on and movable withthe carriage.

4. A convertible turning and milling machine, comprising a latheorganization of bed, head-stock, spindle, carriage, and garriage feedingmeans, main driving means loose on the' spindle, worm driving meansloose on the spindle, a system of variable speed gearing andtransmission elements between said main driving means and worm, a systemof variable speed gearing and transmission elements between the maindriving means and carriage feed means, means for alternately engagingsaid main driving means and worm driving means in driving connectionwith the spindle and rotative cutter, driving means mounted on andmovable with the carriage, and indexing mechanism interposed with saidworm driving means, providing divisional working guides to a givenrotation of the spindle relative to the feed of the carriage.

ln testimony whereof, I have hereunto set my hand.

FREDERICK H. BEROLD.

Witnesses:

OLIVER B. KAISER, EMMA SPENER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

